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Semmy [17]
3 years ago
5

Your school is choosing a new school mascot to represent all team sports. which group should you ask to get a random sample of s

tudent opinion A. students on the basketball team B. every 10th students that enters the cafeteria C.the first 20 seniors at the library D. students on the cheerleading squad
Mathematics
1 answer:
ser-zykov [4K]3 years ago
5 0
Answer: B. Every 10th students that enters the cafeteria

Explanation:

B is a random sample, while A, C, and D are biased.
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Simplify 12y^7/18y^-3. Assume y=0
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Answer:

its the third one i got that

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How do you find the coordinates of a missing side of a square (axes)​
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Answer:So first, I found the length of the sides and the diagonal of the square, which are 18−−√ and 6 respectively. By graphing, I know the solution is (0,−1). Then, I assume that since the length between (3,2) and (−3,2) is the diagonal, then the distance between (0,5) and the remaining vertex must be the diagonal too. And since the length of the side is 6, then the distance between the vertex and either (3,2) or (−3,2) must be 6. So:

(x−3)2+(y−2)2−−−−−−−−−−−−−−−√=18−−√

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Which gives (after a bit of cleaning up):

x2+y2−10y=11

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Then, replacing the second expression into the first one:

x2−6x+y2−4y=5⇒x2=5+6x−y2+4y

5+6x−y2+4y+y2−10y=11

5+6x+4y−10y=11

6x−6y+6

x−y=1

x=1+y

Up to this point, I know I'm not entirely wrong because the expression is true for the actual coordinates of the vertex, because 0=1+(−1) is true. But I wouldn't know how to proceed if I hadn't known the answer beforehand. I need to find both x and y, is there a linear equation I'm missing to find the exact coordinates of the last vertex? Is my process okay or is there a simpler way to do it?

Step-by-step explanation:

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3 years ago
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Ierofanga [76]
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Have a good day hope this helps! :)
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Colt1911 [192]

Answer:

a_n = 2+6(n-1)

Step-by-step explanation:

Explicit Arithmetic Formula: a_n=a_1 + d(n-1)

a₁ is 1st term in sequence

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<em>n</em> is term number

Step 1: Find <em>d</em>

d = 8 - 2 = 6

Step 2: Plug in variables into formula

a_n = 2+6(n-1)

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